Taxpayer receives social security and runs a small sole proprietorship for which he receives 1099-MISC forms (buys and sells equipment, small net profit). He stopped filing tax returns in 2012, and from that point forward, his wife threw all IRS notices away before he had a chance to see them. Based on the 1099-MISCs, a substitute return was created for 2012, and a liability of $15,000 was calculated. This was gradually taken from him over the years (from bank accounts and social security checks).
I am going to file a tax return for him for 2012 (finally), and it will show no tax liability due to business deductions. My question is whether I can get back all of the money that was taken. The statute of limitations is two years after payment, but I'm not sure if that applies to levies. Can I go back beyond two years, to the money that was seized before then? If not, can I perhaps claim financial disability or innocent spouse?